The president-elect is known for his frequent, often unsubstantiated, attacks

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President-elect Donald Trump walks through the lobby of the New York Times following a meeting with editors at the paper on Nov. 22, 2016, in New York City.

During his run for the White House, Donald Trump stirred up controversy with frequent, unsubstantiated attacks directed toward various groups and individuals, from his political rivals to foreign governments to news outlets.

Now, as NBC News reports, some are raising concerns about Trump's information sources and whether the president-elect will act on false or flawed reports.

For instance, Trump's recent claim that Hillary Clinton won the popular vote with "millions" of illegal voters was a baseless theory popularized primarily by conspiracy theorist Alex Jones of Infowars.

Many argue that being able to discern credibility in news reports is a crucial skill for a president, and they argue that a seeming inability, or disinclination, to separate fact from fiction could pose serious threats to national security.

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